There were some rough edges, but I'm sticking with three stars because it's sushi and sake in the mountains, with great cocktails and a wonderful desert. The issues:
* dirty menu
* hot sake delivered room temp, server acknowledged the machine doesn't always work correctly so they'd use a backup to prepare a new one, which did come out hot. If it's a known issue though, you'd hope they'd either fix the machine or check that it's hot. The carafe was not even warm, when normally you would have a hard time holding it for an extended period when it's first served, so the fact that it was cold would have been obvious.
* it's in a spare room the hotel uses for event space, so yes it is a pop-up, which means the decor is a couple Japanese screens and not much else
* the rolls tasted great, but some would fall apart when picked up
* soy sauce bottle on the table was empty and dirty
So, could have been better, but the food quality seemed great; nice and fresh rolls and nigiri. The cocktails were unique and delicious. The desert... that was the highlight. Very unique; I unfortunately can't find the name of it as it's not on the regular menu, but it was a frozen desert like a Japanese ice cream, but soft in the center, and was served with green tea and mango flavors.
If you're looking for a really wonderful sushi and/or fish experience, and don't mind the drive, Hooked over in Beaver Creek is where you'd really want to go. It's our favorite restaurant in the Rockies. read more